Spark plug.
This spark plug claims that unlike ordinary spark plugs that have a platinum alloy electrode, it has a pure platinum center electrode. It also claims to use yttrium in the ground electrodes. Source:Auto Parts Store Contributor:Theodore Gray Acquired:10 January, 2003 Text Updated:11 August, 2007 Price: $5 Size: 3" Purity: >90% Sample Group:Spark Plugs